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Old 1st Aug 2018, 2:16 pm   #22
jonnybear
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Join Date: Nov 2010
Location: Cullompton, Devon, UK.
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Default Re: Battery tag spot welder.

Quote:
Originally Posted by rambo1152 View Post
Thus guy is seen removing the "I" laminations, the lifting off the entire HT bobbin with relative ease.

https://www.youtube.com/watch?v=DRVlqwsIl6M

<edit>
Actually after watching it properly he safely removes the primary and filament windings and leaves the bit we want to know for another episode.

Looking at one of mine, the weld is quite superficial. More so in real life than this picture suggests, and I think a small grinder might be more suitable than a hacksaw.
Do not see the point of cutting the laminations removing secondary and heater windings and then re welding when you can cut the secondary winding with a hack saw and drill out the rest bit fiddly I Know and you have to be careful not to damage primary winding, If you are good at tig welding not a problem welding the laminations back. I went for the easy option cutting and drilling the heater and secondary windings.
John
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